US2837686A - Klystron apparatus - Google Patents

Klystron apparatus Download PDF

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Publication number
US2837686A
US2837686A US612995A US61299556A US2837686A US 2837686 A US2837686 A US 2837686A US 612995 A US612995 A US 612995A US 61299556 A US61299556 A US 61299556A US 2837686 A US2837686 A US 2837686A
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United States
Prior art keywords
walls
resonator
tuning
klystron
cylinder
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Expired - Lifetime
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US612995A
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English (en)
Inventor
Donald F Drieschman
Arthur A Goldfinger
Stanley F Mitchell
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Varian Medical Systems Inc
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Eitel Mccullough Inc
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Filing date
Publication date
Priority to NL221236D priority Critical patent/NL221236A/xx
Application filed by Eitel Mccullough Inc filed Critical Eitel Mccullough Inc
Priority to US612995A priority patent/US2837686A/en
Priority to GB28526/57A priority patent/GB843662A/en
Priority to FR1196843D priority patent/FR1196843A/fr
Application granted granted Critical
Publication of US2837686A publication Critical patent/US2837686A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
    • H01J25/10—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator
    • H01J25/12—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator with pencil-like electron stream in the axis of the resonators

Definitions

  • This invention relates to klystron apparatus and more particularly to apparatus including a klystro-n tube and magnetic circuitry therefor.
  • klystrons normally comprise an elongated envelope forming a drift tube havingv an electron gun at one end and a collector electrode at the other end.
  • the drift tube is made ⁇ of aplurality of spaced tubular sections forming between them gaps which are surrounded by cavity resonators.
  • lt is also well known that the upper frequency level at which a klystron will operate depends to some extent on the distance between said gaps; the smaller the distance, the higher the frequency.
  • An object of this invention is to provide an improved construction for klystrons in which it is desirable to have relatively small spacing between adjacent gaps in the drift tube.
  • a further object of the invention is to provide an improved construction for a cavity resonator which permits cooling air to be blown through the inside of the resonator.
  • Another object of the invention is to provide an improved construction for the tuning doors of the cavity resonator whereby cooling air can be blown through the doorsl and thus through the resonator.
  • An additional object of the invention is to provide an air duct arrangement associated with a klystron and its magnetic circuitry in such manner as to provide improved cooling and to facilitate insertion and removal of the klystron from the magnetic circuitry.
  • Normally cavity resonators have therein a tuning member which is movable radially of the drift tube axis and is operated by a radially extending tuning shaft.
  • Klystrons of the type under consideration are surrounded by a magnetic circuit which includes magnet coils. When widely spaced resonators are used, the magnet coils can be spaced between them so that the tuning shafts can pass between the coils. are close to each other there is insutiicient' space between the tuning shafts to accommodate coils of sutlicient slze.
  • a further object of the invention is to provide improved klystron apparatus wherein a magnet coil surrounds a plurality of compactly positioned cavity resonators and yet does not interfere with the shafts or other operating mechanisms for the tuning members in the resonators.
  • Another object of the invention is to provide improved However, when 'the resonators Fatented ⁇ lume 3, 1953 magnetic circuitry which permits insertion and removal of a klystron with minimum effort and delay.
  • a further object of the invention is to provide an extremely strong and compact klystron, and magnetic circuitry therefor having an improved arrangement for holding the klystron rmly in position.
  • Figure l discloses an electron tube apparatus with the upper half essentially in cross section and the lower half essentially in side elevation with parts broken away.
  • Figure 2 is a view along line 2-2 of Figure l.
  • Figure 3 is an enlarged view along line 3-3 of Figure l, with the upper tuning door moved inwardly.
  • Figure 4 is a bottom view of Figure 3.
  • Figure 5 is a prospective view of the shroud shown in Figures l, 2 and 3. i
  • Figure 1 discloses a klystron comprising an electron gun 6, having a cathode 7, a focusing electrode 3 and an anode 9; a collector electrode 10 having cooling ns 11; and a drift tube structure comprising a plurality of spaced tubular sections 12, 13, 14 and 15 forming -three gaps therebetween.
  • Drift tube sections 12, 13,y 14 and 15 are each pro-vided with radially extending flanges 16, 17, 13 ⁇ and ⁇ 19, respectively, which form end walls of cavity resonators that are provided ⁇ around the three gaps.
  • a cylinder 21 of insulating material such as ceramic surrounds each gap and is sealed between adjacent end walls 16-19 to form outer walls of the evacuated tube envelope.
  • Additional walls 22, 23, 24 and 2S are brazed respectively to walls 16, 17, 18 and 19 ⁇ to form outward extensions thereof.
  • the extension walls 22-25 have parallel grooves therein in which .resonator side walls 28 are brazed.
  • the resonators are completed by the addition of tuning doors 30 as shown best in Figures 3 .and ⁇ 4.
  • Each of 'the tuning doors comprises a hollow rectangular frame having short sides 31, and long sides 32 joined by bridge 33 so as -to form the two apertures 34.
  • Short walls 35 extend inwardly toward ceramic cylinder 21 from the frame sides 31, and long walls 36 extend inwardly from the frame sides 32.
  • Resilient contact lingers 39" are positioned around the walls 35 and 36 and are held in place by screws 40.
  • a metal screen wall 41 ⁇ is brazed acros's the frame' provided by the inn'er edges of walls 35 which are Vstraight and the inner edges of walls 36 which are' curved to t around 'the ceramic cylinder when the tuning door is moved to its inner position as shown in the upper half of Figure 3.
  • the use of a sieve-like end wall for the tuning door such as is formed by screen 4l forms an irnportant feature of the invention as will be described hereinafter. It vshould be understood that during tube opera- In order to complete the ytuning doors' frequency energy between the internal resonator portion and the external resonator portion.
  • the resilient contact fingers 39 on the tuning doors 30 are in sliding engagement with the resonator end walls 22-25 and the resonator side walls 2S sothat the doors can be moved radially of the tube axis toward and away from cylinders 21. Adjustment of the tuning doors is accomplished by means of threaded shafts 43, each having an annular ange 44 rotatably received in a countersunk hole in the bridge portion 33 of each tuning door. T he flange 44 is held in place by a cover plate 45 secured to the bridge by means of screws 46. Shaft 43 is rotatably engaged in a threaded aperture 48 formed in a bracket 49 which is held between resonator walls 28 by meansof screws 50.
  • brackets 49 do not form closures for the resonators but serve merely as supports for the shafts 43.
  • cooling air can be blown into one end of the resonators, through the tuning doors via apertures 34 and screen walls 41, and
  • drift tube section has a radially extending llange 55 brazed thereto in addition to the flange 19 and its extension 25.
  • Flange 55 and the extension ange have radially extending grooves therein in which reinforcing ribs 56 are brazed.
  • the collector electrode 10 has brazed thereto a ange 57 which is insulatingly connected to flange by means of a .ceramic cylinder 58 which is sealed between the flanges.
  • the structure thus far described forms a unitary klystron assembly although some parts such as the tuning doors 30 are external to the envelope of the tube per se.
  • the klystron assembly is surrounded by a magnetic circuit including a frame of magnetic material comprising end plates 60 and'61 connected by spaced rods 62 which are fixed to the plates by means of screws 63.
  • End plate 60 is apertured at 64 to accommodate passage of cooling iin structure 11.
  • a cylinder extends inwardly from plate 60 adjacent to aperture 64 and is held in place by screws 66.
  • the inner end of cylinder 65 is provided with a flange 67 which serves to hold in place a magnet coil 70.
  • the inner end of cylinder 65 is recessed to provide a shoulder 71 againstwhich is seated the flange 55.
  • Flange 55 has around its periphery a V-notch which is engaged by a plurality of screws 72 to hold the klystron secured within the magnetic frame.
  • the end plate 61 is provided with a large central aperture in which a smaller plate 73 is secured by screws 74.
  • Plate 73 has a small central aperture surrounding drift tube section 12 and is made in two halves in order that it may be assembled after the tube has been inserted through plate 61.
  • the magnetic circuit includes a second magnet coil 75 which is adjustably supported for movement longitudinally of the axis of the klystron.
  • Supporting means for coil 75 are provided in the form of collars 76 which are slidably received on several of the rods 62 where they are held in the desired position by means of set screws 77.
  • the magnetic circuit is completed by a focusing coil 80 which is surrounded by centrally apertured plates 81 and S2 of magnetic material. Plate 81 is attached to plate 82 by means of screws 83, and plate 82 it attached to the ⁇ main magnetic plate 61 by means of screws 84. Plates 81 and 82 are made in two halves so they can be assembled around drift tube section 12.
  • Air duct 86 comprises a shroud 37 which forms a cover over one end of the cavity resonators and opens onto the resonators in registry with the open ends of the resonators.
  • plates 89 are placed parallel to the resonator side Walls 28 and brazed between the adjacent end wallflanges 22-25 to form an additional wall which cooperates with the side and end walls to make air channels extending parallel with the resonators. As shown in Figure 3, plate 89 is omitted adjacent to side resonator wall 28 to which the input coupling 90 is connected.
  • the plate 89 is omitted on the side of the output resonator which receives the output coupling 91 as shown in Figure l. Accordingly, there are a total of four of the plates 89, two on the middle resonator, and one each on the input and output resonators. As shown in Figures 3 and 4, cooling ns 93 are positioned between resonator walls 28 and plates 89 and are brazed to the adjacent plates 22-25.
  • the shroud 87 has an elongated inlet slot 94 adjacent one en-d thereof and three apertures 95, 96 and 97 located along the center line of the shroud. Beneath slot 94 the shroud is provided with a band 98 which rests upon resonator end wall 25 as shown in Figure l. The sides of the shroud are each provided with two holes 100 in which screws 101 are received for attaching the shroud to the plates 89.
  • the air duct 86 includes a tubular inlet portion 103 which is flattened to form a rectangular inner end 104 which is received within the elongated slot 94 in the shroud.
  • the tubular portion 103 is secured to the shroud by means of screws 106 extending through tabs 107 and received within threaded apertures provided in the shroud.
  • the inlet slot 94 in the shroud is positioned adjacent the output resonator, that is, the resonator nearest the collector 10, so that this resonator will receive the greatest cooling flow since it is the one in which the greatest heat is developed.
  • each of the brackets has a curved portion 110 which tits around tubular portion 103.
  • Each of the. brackets is slightly longer than the shortest distance between adjacent rods 62. Accordingly, when the brackets are clamped together by the screws 111 as shown in Figure 2 they are firmly wedged between the rods 62 to form a tight support for tubular portion 103.
  • shafts 43 on the tuning doors 30 do not extend radially beyond the circle formed by the rods 62. Accordingly, it is necessary to provide removable extensions 115. Only one such extension has been shown in Figure l but it should be understood that an extension is provided for each of the shafts 43.
  • Each extension 115 is lprovided at its outer end with a knob 116 by which it may be easily rotated.
  • the inner end of each extension is provided with means for transferring torque to its associated shaft 43.
  • a convenient means for detachably connecting the extensions and shafts for torque transfer is to provide a screw-driver blade 117 on the inner end of each extension 115 and a cooperating slot 118 on the outer end oteach shaft 43.
  • a collar 119 is attached to the outer end of each shaft 43 ⁇ and serves both as a guide for extension 115 and a stop which determines the inner limit to which the associated door 30 can be moved. Since the resonant cavities are so closely spaced, there is not su'icient room between adjacent tuning shafts 43 in which eiciently to place separate magnet coils. .ln order to use the single coil 75, radially extending bores 122 are provided therein to provide passageway for the tuning means comprising shafts 43 and their extensions 115.
  • the circuit assembly thus far described forms a permanent socket structure which need not be disassembled in order to remove an existing klystron and insert a new one.
  • the klystron is inserted downwardly, collector end first, in the assembled circuit structure previously described. Flange 55 on the tube comes to rest against shoulder 71 on the cylinder 65 and is fixed in place by tighteningscrews 72. It should be understoodat the time the klystron is inserted it carries shroud 87 and that the inner diameter of coil 7S is sufficient to receive the shroud. ln addition it should be understood at the time the klystron is inserted the tubular portion 103 of the air duct is withdrawn outwardly so las not to prevent downward movement of the shroud. In addition, the tuning shafts 43 are screwed inwardly far enough that their colla-rs 119 will not ystrike coil 75.
  • tubular portion 103 is moved inwardly until its rectangular end 104 is received within slot 94 and is then secured in place by the screws 166. Then the brackets 103 and 109 are clamped together around the tubular portion by means of screws 111.
  • the split plate 73 is positioned as shown in Figure l and secured in place by screws 74.
  • the split plate 82 is positioned in place by means of screws S4, and the coil t) and split plate 81 are attached to plate 82 by means of screws 83. ln order to adjust the tuning doors the extensions 115 are inserted through the bores 122 in coil 75 and are engaged with the outer ends of shafts 43.
  • all metal parts of the klystron are made of non-magnetic material so as not to interfere with the field provided by the magnetic circuit.
  • the only parts which are made of magnetic material are the main parts of the magnetic circuit; namely, plates 60, 61, 73, 31 and 82, the rods 62, and the cylinder 65.
  • a blower (notV shown) is connected to the outer end of the tubular inlet portion 103 of the air duct 86. Air from the blower passes through inlet portion 1ti3 and then into the shroud 87 which directs the air into each cavity resonator where it passes through the sieve-like screens 41 of the tuning doors. In addition the shroud directs the air through the channels containing cooling fins 93.
  • the shroud directs air across the input coupling 90, the output coupling 91 and the lresonator walls 28 in which these couplings are mounted After performing its cooling function the air is free, to escape relatively unrestricted from the magnetic circuit because rods 62 are relatively narrow ⁇ and are widely spaced.
  • each cavity resonator flows into one end of each cavity resonator, through one of the tuning doors, around the ceramic cylinder 21, and out the other tuning door.
  • This cooling feature is of course made possible by the sieve-like screen wall 41 on the tuning doors 30.
  • the sieve-like wall 41 prevents the passage of any appreciable radio-frequency energy while permitting the passage of air.
  • the basic criterion in designing the sieve-like wall 41 is to make each aperture and its metal boundary form such a high capacitance that the wall 41 appears to the radio-frequency current as a solid member. As a practical matter it has been found that the maximum permissible area of the apertures in wall 41 is in general dependent upon the frequency of the current in the resonator.
  • the apertures must be of smaller area for klystrons designed for a higher frequency range than for klystrons designed for a lower frequency range.
  • the shape of each aperture and its depth help determine whether or not radio frequency will leal; through the sieve-like wall d1. For example, increasing the depth of the aperture helps prevent leakage.
  • a honeycomb structure would be electrically better ⁇ than the thin screen shown in the drawing, but it would be substantially worse from the standpoint of lair flow.
  • Electron tube apparatus comprising a klystron -having an air-tight envelope with an electron gun at one end and a collector electrode at the other end, a plurality ot cavity resonator portions surrounding said envelope intermediate said gun and collector and having open ends, each two adjacent resonator portions having a cornmon wall whereby all of the resonator portions are grouped compactly along said envelope, two tuning doors mor/ably mounted in each resonator portion, each of said doors having a sieve-like wall forming a part of the inner surface of its respective resonator portion, a shroud opening onto said resonator portions in registry with the open ends of said resonator portions, said shroud having an inlett aperture therein adjacent the 'resonator portion nearest said Collector, a magnetic circuit surrounding said envelope and comprising a frame including end plates spaced along the lrlystron axis and extending transversely of said axis, spaced rods interconnecting said end plates and arranged around the
  • a klystron comprising an envelope having an electron gun at one end and a collector electrode at the yother end, a drift tube interposed between said gun and said collector, said drift tube comprising spaced tubular sections forming a gap, a cavity resonator portion formed internally of said envelope and comprising end walls extending radially from said tubular sections and a cylinder of insulating material surrounding sm'd gap and sealed between said end walls to form the outside wall of said internal resonator portion, a cavity resonator portion external to said envelope and comprising a rst pair of walls forming external extensions of said end walls, a second pair of walls connected between said first pair of walls, said second walls bein-g spaced externally of said cylinder and positioned on opposite sides of the cylinder, tuning doors positioned within said rst and second walls on opposite sides of said cylinder and forming the outer walls of said external resonator 'portion, and means for moving said tuning doors toward and away from said cylinder, said outer walls formed by said
  • An electron tube comprising a vacuum-tight enverope with an electron gun at one end and a collector electrode at the other end, a cavity resonator portion' s'urrounding said tube externally of said envelope and intermediate said gun and said collector, and a tuning door movably mounted in said ⁇ resonator portion, said tuning door comprising a sieve-like portion forming part of the inner surface of said resonator portion.
  • Electron tube apparatus comprising a klystron having a vacuum-tight envelope with an electron gun at one end and a collector electrode at the other end, a cavity resonator portion surrounding said klystron 'externally of said envelope and intermediate said gun and collector, said resonator portion being open at opposite ends, two tuning doors movably mounted in said resonator portion and each having a sieve-like portion forming part of the inner surface of said resonator portion, and an air duct having one end opening onto said resonator portion in registry with one of said open ends.
  • Electron tube apparatus comprising a beam-type electron tube comprising an envelope having an electron gun at one end and a collector electrode at the other end, a drift tube interposed between said gun and said collector, said dritt tube comprising spaced tubular sections forming a gap, a cavity resonator portion formed internally of said envelope and comprising end walls extending radially from said tubular sections and a cylinder of insulating material surrounding said gap 'and sealed between said end walls to form the outside wall of said internal resonator portion, a cavity resonator portion external to said envelope and comprising a first pair of walls forming external extensions of said end walls and a second pair of walls connected between said rst pair of walls, said second walls being spaced externally of said cylinder and positioned on opposite sides of the cylinder, an additional wall connected between said rst pair of walls and spaced outwardly from one of said second walls to form an air channel in cooperation with said one second wall and said tirst pair of walls, tuning doors movably positioned within said
  • Electron tube apparatus comprising a beam type electron tube having a vacuum-tight envelope with an electron gun at one end and a collector electrode at the other end, a cavity resonator portion surrounding said envelope intermediate said gun and collector, a tuning door movably mounted in said resonator portion and having a sieve-like portion forming part of the inner surface of said resonator portion, adjustment means for moving said tuning door toward and away from said envelope, a magnetic circuit surrounding said tube comprising a magnet coil encircling said resonator portion, said coil being provided with a radially extending bore for the reception of said tuning means, and a shroud opening on to said resonator portion in substantial registry with said tuning door, said shroud having an aperture therein in substantial alignment with the bore in said coil.
  • Electron tube apparatus comprising a beam type electron tube having a vacuun -tight envelope with an electron gun at one end and a collector elect-rode at the other end, a cavity resonator portion surrounding said envelope intermediate said gun and collector, a tuning door movably positioned in said resonator portion for movement toward and away from said envelope, means forming a threaded opening at one end of said resonator portion, a threaded adjustment shaft received Within said threaded bore and rotatably secured to said tuning door, a magnetic circuit ysurrounding said tube comprising a magnetcoil encircling said resonator portion, said coil having a bore extending radially therethrough in substantial alignment with said shaft, and an adjustment shaft 8 extension receivable in said bore 4in the magnet coil, said shaft and said extension being easily separated one from the other and having inter-engaging means for transmitting torque therebetween.
  • Magnetic circuitry for a klystron, said circuitry comprising a frame having two end plates of magnetic material, means connected to said plates and holding them spaced one -from the other, said connecting means being of magnetic material and being positioned to surround a substantial open space, a magnet coil supported on said frame and positioned between said plates within the space surrounded by said connecting means, said coil being in substantial parallelism with said plates, a bore extending through said coil from its inner periphery to its outer periphery, and an air duct extending into said space surrounded by said connecting means, and adjustable clamping-means supporting said duct on said magnetic frame for movement toward and away from the center of said open space in a plane substantially parallel to said plates.
  • Magnetic circuitry for a klystron comprising a frame having two end plates of magnetic material, a plurality of rods interconnecting said plates and arranged in a circular array, collars adjustably positioned on some of said rods, a magnet coil positioned within the circle -formed by said rods and held in place by engagement between the collars on said rods, an air duct extending into the circle formed by said rods, and means adjustably supporting said duct between two of said rods for adjustment inwardly and outwardly of said circle.
  • Magneti-c circuitry for a klystron, said circuitry comprising a magnetic frame including two centrally apertured end plates, means interconnecting said plates and holding the plates in spaced parallel relation, a cylinder of magnetic material attached to one of said plates and extending toward the other plate, said cylinder having a recess forming an annular shoulder therein, a threaded aperture in said cylinder opening inwardly to said recess and a screw in said aperture, a lirst magnet coil surrounding said cylinder, and a second magnet coil positioned within the boundary formed by said connecting means and spaced from said first coil toward said other end plate, said second coil having a bore extending therethrough from its inner periphery to its outer periphery.
  • a ldystron comprising an envelope having an electron gun -at one end and a collector electrode at the other end, a drift tube interposed between said gun and said collector, said drift tube comprising spaced tubular sections forming gaps therebetween, a cavity resonator portion for each of said gaps formed internally of said envelope and comprising end walls extending radially from said tubular section and a cylinder of insulating material surrounding each of said gaps and sealed between two of said end walls to form a vacuum-tight wall for the respective resonator portion, cavity resonator portions external to said envelope and each comprising a first pair of walls forming integral extensions of said end walls, each of said external portions further comprising a second pair of walls rigidly connected between said first pair of walls, said second walls being spaced externally of their respective insulating cylinder and positioned on opposite sides of the cylinder, and a mounting plate rigidly joined to said extension wall which is closest to said collector.
  • a klystron as claimed in claim l1, in combination with magnetic circuitry comprising a frame of magnetic material including two centrally apertured end plates, means interconnecting said plates and holding the plates in spaced paraliel relation, a cylinder attached to one of said plates and extending toward the other plate, said cylinder having a recess forming an annular should-er therein, a threaded aperture in said cylinder opening inwardly to said recess, and a screw in said aperture, said ltlystron being received within said magnetic circuitry and said mounting plate on the klystron having a V- groove tlterearound into which said screw projects.
  • a klystron comprising an'envelope having an electron gun at 'one end and a collector electrode at the other end, a drift tube interposed between said gun and said collector, said-drift tube comprising spaced sections forming gaps therebetween, a cavity resonator portion for each of such gaps formed internally of said envelope and comprising end walls extending radially from said tubular section and a cylinder of insulating material surrounding each of said gaps and sealed between two of said end walls forming a vacuum tight wall for the respective resonator portions, cavity resonator portions external to said envelope and each comprising a irst pair of walls forming integral extensions of said end walls, each of said external portions further comprising a second pair of walls rigidly connected between said rst pair of walls, said second pair of walls being spaced externally of their respective insulating cylinder and positioned on opposite l0 sides of said cylinder, another wall positioned externally of one of said second pair of walls and between said rst pair of walls to form a channel

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US612995A 1956-10-01 1956-10-01 Klystron apparatus Expired - Lifetime US2837686A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL221236D NL221236A (enrdf_load_stackoverflow) 1956-10-01
US612995A US2837686A (en) 1956-10-01 1956-10-01 Klystron apparatus
GB28526/57A GB843662A (en) 1956-10-01 1957-09-10 Electron tubes comprising a cavity resonator
FR1196843D FR1196843A (fr) 1956-10-01 1957-09-30 Tube électronique du type klystron

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Application Number Priority Date Filing Date Title
US612995A US2837686A (en) 1956-10-01 1956-10-01 Klystron apparatus

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US2837686A true US2837686A (en) 1958-06-03

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US (1) US2837686A (enrdf_load_stackoverflow)
FR (1) FR1196843A (enrdf_load_stackoverflow)
GB (1) GB843662A (enrdf_load_stackoverflow)
NL (1) NL221236A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949559A (en) * 1958-01-31 1960-08-16 Eitel Mccullough Inc Klystron tube
US3076116A (en) * 1959-09-21 1963-01-29 Eitel Mccullough Inc Klystron apparatus
US3172008A (en) * 1961-06-09 1965-03-02 Philips Corp Device for concentrating the electron beam in a high-power klystron comprising more than two cavity resonators
US3617799A (en) * 1968-06-21 1971-11-02 Varian Associates Gang tuner for a multicavity microwave tube
US3838308A (en) * 1973-11-05 1974-09-24 Varian Associates Gang-tuned multicavity microwave tube
WO2016099622A1 (en) * 2014-12-18 2016-06-23 General Electric Company Tunable tube amplifier system of a radio-frequency power generator
US9859851B2 (en) 2014-12-18 2018-01-02 General Electric Company Coupling assembly and radiofrequency amplification system having the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2423186B (en) 2005-02-11 2009-06-03 E2V Tech Magnetic assembly for a linear beam tube

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2293387A (en) * 1939-02-02 1942-08-18 Rca Corp Electron discharge device
US2410109A (en) * 1943-02-13 1946-10-29 Bell Telephone Labor Inc Variable cavity resonator
US2425748A (en) * 1941-03-11 1947-08-19 Bell Telephone Labor Inc Electron discharge device
US2619611A (en) * 1951-05-29 1952-11-25 Eitel Mccullough Inc Electron tube apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2293387A (en) * 1939-02-02 1942-08-18 Rca Corp Electron discharge device
US2425748A (en) * 1941-03-11 1947-08-19 Bell Telephone Labor Inc Electron discharge device
US2410109A (en) * 1943-02-13 1946-10-29 Bell Telephone Labor Inc Variable cavity resonator
US2619611A (en) * 1951-05-29 1952-11-25 Eitel Mccullough Inc Electron tube apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949559A (en) * 1958-01-31 1960-08-16 Eitel Mccullough Inc Klystron tube
US3076116A (en) * 1959-09-21 1963-01-29 Eitel Mccullough Inc Klystron apparatus
US3172008A (en) * 1961-06-09 1965-03-02 Philips Corp Device for concentrating the electron beam in a high-power klystron comprising more than two cavity resonators
US3617799A (en) * 1968-06-21 1971-11-02 Varian Associates Gang tuner for a multicavity microwave tube
US3838308A (en) * 1973-11-05 1974-09-24 Varian Associates Gang-tuned multicavity microwave tube
WO2016099622A1 (en) * 2014-12-18 2016-06-23 General Electric Company Tunable tube amplifier system of a radio-frequency power generator
US9515616B2 (en) 2014-12-18 2016-12-06 General Electric Company Tunable tube amplifier system of a radio-frequency power generator
US9859851B2 (en) 2014-12-18 2018-01-02 General Electric Company Coupling assembly and radiofrequency amplification system having the same

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GB843662A (en) 1960-08-10
FR1196843A (fr) 1959-11-26
NL221236A (enrdf_load_stackoverflow)

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